From aa431ca700139dbaaddd14e689f58625469f94d0 Mon Sep 17 00:00:00 2001
From: Greg Hackmann <ghackmann@google.com>
Date: Wed, 22 May 2013 14:23:10 -0700
Subject: video: add atomic display framework

Change-Id: I693257e269a99012cd0dbb57576ac222869cf4c7
Signed-off-by: Greg Hackmann <ghackmann@google.com>
---
 drivers/video/adf/adf_sysfs.c | 284 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 284 insertions(+)
 create mode 100644 drivers/video/adf/adf_sysfs.c

(limited to 'drivers/video/adf/adf_sysfs.c')

diff --git a/drivers/video/adf/adf_sysfs.c b/drivers/video/adf/adf_sysfs.c
new file mode 100644
index 00000000000..567c5599793
--- /dev/null
+++ b/drivers/video/adf/adf_sysfs.c
@@ -0,0 +1,284 @@
+/*
+ * Copyright (C) 2013 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <video/adf_client.h>
+
+#include "adf.h"
+#include "adf_fops.h"
+#include "adf_sysfs.h"
+
+static struct class *adf_class;
+static int adf_major;
+static DEFINE_IDR(adf_minors);
+
+#define dev_to_adf_interface(p) \
+	adf_obj_to_interface(container_of(p, struct adf_obj, dev))
+
+static ssize_t dpms_state_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct adf_interface *intf = dev_to_adf_interface(dev);
+	return scnprintf(buf, PAGE_SIZE, "%u\n",
+			adf_interface_dpms_state(intf));
+}
+
+static ssize_t current_mode_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct adf_interface *intf = dev_to_adf_interface(dev);
+	struct drm_mode_modeinfo mode;
+
+	adf_interface_current_mode(intf, &mode);
+
+	if (mode.name[0]) {
+		return scnprintf(buf, PAGE_SIZE, "%s\n", mode.name);
+	} else {
+		bool interlaced = !!(mode.flags & DRM_MODE_FLAG_INTERLACE);
+		return scnprintf(buf, PAGE_SIZE, "%ux%u%s\n", mode.hdisplay,
+				mode.vdisplay, interlaced ? "i" : "");
+	}
+}
+
+static ssize_t type_show(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	struct adf_interface *intf = dev_to_adf_interface(dev);
+	return scnprintf(buf, PAGE_SIZE, "%s\n",
+			adf_interface_type_str(intf));
+}
+
+static ssize_t vsync_timestamp_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct adf_interface *intf = dev_to_adf_interface(dev);
+	ktime_t timestamp;
+	unsigned long flags;
+
+	read_lock_irqsave(&intf->vsync_lock, flags);
+	memcpy(&timestamp, &intf->vsync_timestamp, sizeof(timestamp));
+	read_unlock_irqrestore(&intf->vsync_lock, flags);
+
+	return scnprintf(buf, PAGE_SIZE, "%llu\n", ktime_to_ns(timestamp));
+}
+
+static ssize_t hotplug_detect_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct adf_interface *intf = dev_to_adf_interface(dev);
+	return scnprintf(buf, PAGE_SIZE, "%u\n", intf->hotplug_detect);
+}
+
+static struct device_attribute adf_interface_attrs[] = {
+	__ATTR_RO(dpms_state),
+	__ATTR_RO(current_mode),
+	__ATTR_RO(hotplug_detect),
+	__ATTR_RO(type),
+	__ATTR_RO(vsync_timestamp),
+};
+
+static char *adf_devnode(struct device *dev, umode_t *mode)
+{
+	return kasprintf(GFP_KERNEL, "adf/%s", dev_name(dev));
+}
+
+int adf_obj_sysfs_init(struct adf_obj *obj, struct device *parent)
+{
+	int ret = idr_alloc(&adf_minors, obj, 0, 0, GFP_KERNEL);
+	if (ret < 0) {
+		pr_err("%s: allocating adf minor failed: %d\n", __func__,
+				ret);
+		return ret;
+	}
+
+	obj->minor = ret;
+	obj->dev.parent = parent;
+	obj->dev.class = adf_class;
+	obj->dev.devt = MKDEV(adf_major, obj->minor);
+
+	ret = device_register(&obj->dev);
+	if (ret < 0) {
+		pr_err("%s: registering adf object failed: %d\n", __func__,
+				ret);
+		goto err_device_register;
+	}
+
+	return 0;
+
+err_device_register:
+	idr_remove(&adf_minors, obj->minor);
+	return ret;
+}
+
+static char *adf_device_devnode(struct device *dev, umode_t *mode,
+		kuid_t *uid, kgid_t *gid)
+{
+	struct adf_obj *obj = container_of(dev, struct adf_obj, dev);
+	return kasprintf(GFP_KERNEL, "adf/%s/device", obj->name);
+}
+
+static char *adf_interface_devnode(struct device *dev, umode_t *mode,
+		kuid_t *uid, kgid_t *gid)
+{
+	struct adf_obj *obj = container_of(dev, struct adf_obj, dev);
+	struct adf_interface *intf = adf_obj_to_interface(obj);
+	struct adf_device *parent = adf_interface_parent(intf);
+	return kasprintf(GFP_KERNEL, "adf/%s/interface%d",
+			parent->base.name, intf->base.id);
+}
+
+static char *adf_overlay_engine_devnode(struct device *dev, umode_t *mode,
+		kuid_t *uid, kgid_t *gid)
+{
+	struct adf_obj *obj = container_of(dev, struct adf_obj, dev);
+	struct adf_overlay_engine *eng = adf_obj_to_overlay_engine(obj);
+	struct adf_device *parent = adf_overlay_engine_parent(eng);
+	return kasprintf(GFP_KERNEL, "adf/%s/overlay-engine%d",
+			parent->base.name, eng->base.id);
+}
+
+static void adf_noop_release(struct device *dev)
+{
+}
+
+static struct device_type adf_device_type = {
+	.name = "adf_device",
+	.devnode = adf_device_devnode,
+	.release = adf_noop_release,
+};
+
+static struct device_type adf_interface_type = {
+	.name = "adf_interface",
+	.devnode = adf_interface_devnode,
+	.release = adf_noop_release,
+};
+
+static struct device_type adf_overlay_engine_type = {
+	.name = "adf_overlay_engine",
+	.devnode = adf_overlay_engine_devnode,
+	.release = adf_noop_release,
+};
+
+int adf_device_sysfs_init(struct adf_device *dev)
+{
+	dev->base.dev.type = &adf_device_type;
+	dev_set_name(&dev->base.dev, "%s", dev->base.name);
+	return adf_obj_sysfs_init(&dev->base, dev->dev);
+}
+
+int adf_interface_sysfs_init(struct adf_interface *intf)
+{
+	struct adf_device *parent = adf_interface_parent(intf);
+	size_t i, j;
+	int ret;
+
+	intf->base.dev.type = &adf_interface_type;
+	dev_set_name(&intf->base.dev, "%s-interface%d", parent->base.name,
+			intf->base.id);
+
+	ret = adf_obj_sysfs_init(&intf->base, &parent->base.dev);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < ARRAY_SIZE(adf_interface_attrs); i++) {
+		ret = device_create_file(&intf->base.dev,
+				&adf_interface_attrs[i]);
+		if (ret < 0) {
+			dev_err(&intf->base.dev, "creating sysfs attribute %s failed: %d\n",
+					adf_interface_attrs[i].attr.name, ret);
+			goto err;
+		}
+	}
+
+	return 0;
+
+err:
+	for (j = 0; j < i; j++)
+		device_remove_file(&intf->base.dev, &adf_interface_attrs[j]);
+	return ret;
+}
+
+int adf_overlay_engine_sysfs_init(struct adf_overlay_engine *eng)
+{
+	struct adf_device *parent = adf_overlay_engine_parent(eng);
+
+	eng->base.dev.type = &adf_overlay_engine_type;
+	dev_set_name(&eng->base.dev, "%s-overlay-engine%d", parent->base.name,
+			eng->base.id);
+
+	return adf_obj_sysfs_init(&eng->base, &parent->base.dev);
+}
+
+struct adf_obj *adf_obj_sysfs_find(int minor)
+{
+	return idr_find(&adf_minors, minor);
+}
+
+void adf_obj_sysfs_destroy(struct adf_obj *obj)
+{
+	idr_remove(&adf_minors, obj->minor);
+	device_unregister(&obj->dev);
+}
+
+void adf_device_sysfs_destroy(struct adf_device *dev)
+{
+	adf_obj_sysfs_destroy(&dev->base);
+}
+
+void adf_interface_sysfs_destroy(struct adf_interface *intf)
+{
+	size_t i;
+
+	for (i = 0; i < ARRAY_SIZE(adf_interface_attrs); i++)
+		device_remove_file(&intf->base.dev, &adf_interface_attrs[i]);
+	adf_obj_sysfs_destroy(&intf->base);
+}
+
+void adf_overlay_engine_sysfs_destroy(struct adf_overlay_engine *eng)
+{
+	adf_obj_sysfs_destroy(&eng->base);
+}
+
+int adf_sysfs_init(void)
+{
+	struct class *class;
+	int ret;
+
+	class = class_create(THIS_MODULE, "adf");
+	if (IS_ERR(class)) {
+		ret = PTR_ERR(class);
+		pr_err("%s: creating class failed: %d\n", __func__, ret);
+		return ret;
+	}
+
+	ret = register_chrdev(0, "adf", &adf_fops);
+	if (ret < 0) {
+		pr_err("%s: registering device failed: %d\n", __func__, ret);
+		goto err_chrdev;
+	}
+
+	class->devnode = adf_devnode;
+	adf_class = class;
+	adf_major = ret;
+	return 0;
+
+err_chrdev:
+	class_destroy(adf_class);
+	return ret;
+}
+
+void adf_sysfs_destroy(void)
+{
+	idr_destroy(&adf_minors);
+	class_destroy(adf_class);
+}
-- 
cgit v1.2.3


From f6b794af955bdda36f7911a771b9ac666e266d07 Mon Sep 17 00:00:00 2001
From: Greg Hackmann <ghackmann@google.com>
Date: Thu, 15 Aug 2013 12:51:22 -0700
Subject: video: adf: make dpms_state sysfs attribute writable

Change-Id: I04e7785cbddac160003e6c9edaf62d20b367fdc9
Signed-off-by: Greg Hackmann <ghackmann@google.com>
---
 drivers/video/adf/adf_sysfs.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

(limited to 'drivers/video/adf/adf_sysfs.c')

diff --git a/drivers/video/adf/adf_sysfs.c b/drivers/video/adf/adf_sysfs.c
index 567c5599793..076ccbd0cd8 100644
--- a/drivers/video/adf/adf_sysfs.c
+++ b/drivers/video/adf/adf_sysfs.c
@@ -33,6 +33,24 @@ static ssize_t dpms_state_show(struct device *dev,
 			adf_interface_dpms_state(intf));
 }
 
+static ssize_t dpms_state_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct adf_interface *intf = dev_to_adf_interface(dev);
+	u8 dpms_state;
+	int err;
+
+	err = kstrtou8(buf, 0, &dpms_state);
+	if (err < 0)
+		return err;
+
+	err = adf_interface_blank(intf, dpms_state);
+	if (err < 0)
+		return err;
+
+	return count;
+}
+
 static ssize_t current_mode_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
@@ -80,7 +98,7 @@ static ssize_t hotplug_detect_show(struct device *dev,
 }
 
 static struct device_attribute adf_interface_attrs[] = {
-	__ATTR_RO(dpms_state),
+	__ATTR(dpms_state, S_IRUGO|S_IWUSR, dpms_state_show, dpms_state_store),
 	__ATTR_RO(current_mode),
 	__ATTR_RO(hotplug_detect),
 	__ATTR_RO(type),
-- 
cgit v1.2.3